1
|
Kamzeeva P, Dagaev N, Lizunova S, Khodarovich Y, Sogomonyan A, Kolchanova A, Pokrovsky V, Alferova V, Chistov A, Eshtukov-Shcheglov A, Eshtukova-Shcheglova E, Belyaev E, Skvortsov D, Varizhuk A, Aralov A. Synthesis and Biological Evaluation of Benzo [4,5]- and Naphtho[2',1':4,5]imidazo[1,2-c]pyrimidinone Derivatives. Biomolecules 2023; 13:1669. [PMID: 38002351 PMCID: PMC10669118 DOI: 10.3390/biom13111669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
Azacarbazoles have attracted significant interest due to their valuable properties, such as anti-pathogenic and antitumor activity. In this study, a series of structurally related tricyclic benzo[4,5]- and tertacyclic naphtho[2',1':4,5]imidazo[1,2-c]pyrimidinone derivatives with one or two positively charged tethers were synthesized and evaluated for anti-proliferative activity. Lead tetracyclic derivative 5b with two amino-bearing arms inhibited the metabolic activity of A549 lung adenocarcinoma cells with a CC50 value of 3.6 μM, with remarkable selectivity (SI = 17.3) over VA13 immortalized fibroblasts. Cell-cycle assays revealed that 5b triggers G2/M arrest without signs of apoptosis. A study of its interaction with various DNA G4s and duplexes followed by dual luciferase and intercalator displacement assays suggests that intercalation, rather than the modulation of G4-regulated oncogene expression, might contribute to the observed activity. Finally, a water-soluble salt of 5b was shown to cause no acute toxic effects, changes in mice behavior, or any decrease in body weight after a 72 h treatment at concentrations up to 20 mg/kg. Thus, 5b is a promising candidate for studies in vivo; however, further investigations are needed to elucidate its molecular target(s).
Collapse
Affiliation(s)
- Polina Kamzeeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
| | - Nikolai Dagaev
- Department of Chemistry and Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.D.)
| | - Sofia Lizunova
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 119435 Moscow, Russia
| | - Yuri Khodarovich
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
- Research and Educational Resource Center for Cellular Technologies, The Peoples’ Friendship University of Russia, 117198 Moscow, Russia
| | - Anna Sogomonyan
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
| | - Anastasia Kolchanova
- Department of Chemistry and Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.D.)
| | - Vadim Pokrovsky
- N.N. Blokhin Cancer Research Center, 115478 Moscow, Russia
- Research Institute of Molecular and Cellular Medicine, RUDN University, 117198 Moscow, Russia
| | - Vera Alferova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
| | - Alexey Chistov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
| | - Artur Eshtukov-Shcheglov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
| | | | - Evgeny Belyaev
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia
| | - Dmitry Skvortsov
- Department of Chemistry and Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119991 Moscow, Russia; (N.D.)
| | - Anna Varizhuk
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 119435 Moscow, Russia
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
- G4_Interact, USERN, University of Pavia, 27100 Pavia, Italy
| | - Andrey Aralov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (P.K.)
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 119435 Moscow, Russia
- G4_Interact, USERN, University of Pavia, 27100 Pavia, Italy
| |
Collapse
|
2
|
Moriya SS, Funaki K, Demizu Y, Kurihara M, Kittaka A, Sugiyama T. Synthesis and properties of PNA containing a dicationic nucleobase based on N 4-benzoylated cytosine. Bioorg Med Chem Lett 2023; 88:129287. [PMID: 37094725 DOI: 10.1016/j.bmcl.2023.129287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 04/05/2023] [Accepted: 04/13/2023] [Indexed: 04/26/2023]
Abstract
We report the synthesis of a peptide nucleic acid (PNA) monomer containing N4-bis(aminomethyl)benzoylated cytosine (BzC2+ base). The BzC2+ monomer was incorporated into PNA oligomers using Fmoc-based solid-phase synthesis. The BzC2+ base in PNA had two positive charges and exhibited greater affinity for DNA G base than the natural C base. The BzC2+ base stabilized PNA-DNA heteroduplexes through electrostatic attractions, even in high salt conditions. The two positive charges on the BzC2+ residue did not compromise the sequence specificity of PNA oligomers. These insights will aid the future design of cationic nucleobases.
Collapse
Affiliation(s)
- Shun-Suke Moriya
- Faculty of Pharmaceutical Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan
| | - Kaoru Funaki
- Faculty of Pharmaceutical Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan
| | - Yosuke Demizu
- Division of Organic Chemistry, National Institute of Health Sciences, Ministry of Health and Welfare, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Masaaki Kurihara
- Faculty of Pharmaceutical Sciences, Shonan University of Medical Sciences, Yokohama, Kanagawa 244-0806, Japan
| | - Atsushi Kittaka
- Faculty of Pharmaceutical Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan
| | - Toru Sugiyama
- Faculty of Pharmaceutical Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan.
| |
Collapse
|
3
|
Periyalagan A, Hong IS. A novel synthetic method of peptide nucleic acid (
PNA
) oligomers using Boc/
Cbz‐protected PNA
trimer blocks in the solution phase. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Alagarsamy Periyalagan
- Department of Chemistry College of Natural Science, Kongju National University Chungnam Republic of Korea
| | - In Seok Hong
- Department of Chemistry College of Natural Science, Kongju National University Chungnam Republic of Korea
| |
Collapse
|
4
|
Liang Y, Miao S, Mao J, Devari S, Gonzalez M, Bong D. Screening of Minimalist Noncanonical Sites in Duplex DNA and RNA Reveals Context and Motif-Selective Binding by Fluorogenic Base Probes. Chemistry 2022; 28:e202103616. [PMID: 34693570 PMCID: PMC8758549 DOI: 10.1002/chem.202103616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Indexed: 01/12/2023]
Abstract
We hypothesize that programmable hybridization to noncanonical nucleic acid motifs may be achieved by macromolecular display of binders to individual noncanonical pairs (NCPs). As each recognition element may individually have weak binding to an NCP, we developed a semi-rational approach to detect low affinity interactions between selected nitrogenous bases and noncanonical sites in duplex DNA and RNA. A set of fluorogenic probes was synthesized by coupling abiotic (triazines, pyrimidines) and native RNA bases to thiazole orange (TO) dye. This probe library was screened against duplex nucleic acid substrates bearing single abasic, single NCP, and tandem NCP sites. Probe engagement with NCP sites was reported by 100-1000× fluorescence enhancement over background. Binding is strongly context-dependent, reflective of both molecular recognition and stability: less stable motifs are more likely to bind a synthetic probe. Further, DNA and RNA substrates exhibit entirely different abasic and single NCP binding profiles. While probe binding in the abasic and single NCP screens was monotonous, much richer binding profiles were observed with the screen of tandem NCP sites in RNA, in part due to increased steric accessibility. In addition to known binding interactions between the triazine melamine (M) and T/U sites, the NCP screens identified new targeting elements for pyrimidine-rich motifs in single NCPs and 2×2 internal bulges. We anticipate that semi-rational approaches of this type will lead to programmable noncanonical hybridization strategies at the macromolecular level.
Collapse
Affiliation(s)
- Yufeng Liang
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| | - Shiqin Miao
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| | - Jie Mao
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| | - Shekaraiah Devari
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| | - Maricarmen Gonzalez
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| | - Dennis Bong
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210
| |
Collapse
|
5
|
Głowacka IE, Piotrowska DG, Andrei G, Schols D, Snoeck R, Wróblewski AE. Acyclic nucleoside phosphonates containing the amide bond: hydroxy derivatives. MONATSHEFTE FUR CHEMIE 2019; 150:733-745. [PMID: 32214483 PMCID: PMC7087949 DOI: 10.1007/s00706-019-2351-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 01/03/2019] [Indexed: 10/29/2022]
Abstract
Abstract To study the influence of a linker rigidity and changes in donor-acceptor properties, three series of nucleotide analogs containing a P-X-HN-C(O)- residue (X=CH(OH)CH2, CH(OH)CH2CH2, CH2CH(OH)CH2) as a replacement for the P-CH2-O-CHR- fragment in acyclic nucleoside phosphonates, e.g., adefovir, cidofovir, were synthesized. EDC proved to provide good yields of the analogs from the respective ω-amino-1- or -2-hydroxyalkylphosphonates and nucleobase-derived acetic acids. New phosphorus-nucleobase linkers are characterized by two fragments of the restricted rotation within amide bonds and in four-atom units (P-CH(OH)-CH2-N, P-CH(OH)-CH2-C and P-CH2-CH(OH)-C) in which antiperiplanar disposition of P and N/C atoms was deduced from 1H and 13C NMR spectral data. The synthesized analogs P-X-HNC(O)-CH2B [X=CH(OH)CH2, CH(OH)CH2CH2, CH2CH(OH)CH2] appeared inactive in antiviral assays on a wide variety of DNA and RNA viruses at concentrations up to 100 μM, while two phosphonates showed cytostatic activity towards myeloid leukemia (K-562) and multiple myeloma cells (MM.1S) with IC50 of 28.8 and 40.7 μM, respectively. Graphical abstract
Collapse
Affiliation(s)
- Iwona E Głowacka
- 1Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| | - Dorota G Piotrowska
- 1Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| | - Graciela Andrei
- 2Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Louvain, Belgium
| | - Dominique Schols
- 2Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Louvain, Belgium
| | - Robert Snoeck
- 2Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Louvain, Belgium
| | - Andrzej E Wróblewski
- 1Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| |
Collapse
|
6
|
Lee YD, Yoon KS, Chun KH. Synthesis of Peptide Nucleic Acid Dimer Containing Modified Cytosine. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yeong Deok Lee
- Department of Chemistry; Soongsil University; Seoul 06978 Republic of Korea
| | - Kyung Sun Yoon
- Department of Information Communication; Materials, and Chemistry Convergence Technology, Soongsil University; Seoul 06978 Republic of Korea
| | - Keun Ho Chun
- Department of Chemistry; Soongsil University; Seoul 06978 Republic of Korea
| |
Collapse
|
7
|
Ovadia R, Mondielli C, Vasseur JJ, Baraguey C, Alvarez K. Contribution to PNA-RNA Chimera Synthesis: One-Pot Microwave-Assisted Ugi Reaction to Obtain Dimeric Building Blocks. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Reuben Ovadia
- Laboratoire d'Architecture et Fonction des Macromolécules Biologiquesm; Université Aix-Marseille UMR CNRS 7257; Equipe “Antiviral Medicinal Chemistry”; Parc scientifique de Luminy, 163 av. de Luminy 13288 Marseille Cedex 9 France
| | - Clémence Mondielli
- Laboratoire d'Architecture et Fonction des Macromolécules Biologiquesm; Université Aix-Marseille UMR CNRS 7257; Equipe “Antiviral Medicinal Chemistry”; Parc scientifique de Luminy, 163 av. de Luminy 13288 Marseille Cedex 9 France
| | - Jean-Jacques Vasseur
- Institut des Biomolécules Max Mousseron (IBMM); UMR 5247 CNRS - Université Montpellier-ENSCM; Département des Analogues et Constituants des Acides Nucléiques, Equipe “ Oligonucléotides Modifiés ”; Bâtiment 17, Campus Triolet, Place Eugène Bataillon 34095 Montpellier Cedex 5 France
| | - Carine Baraguey
- Institut des Biomolécules Max Mousseron (IBMM); UMR 5247 CNRS - Université Montpellier-ENSCM; Département des Analogues et Constituants des Acides Nucléiques, Equipe “ Oligonucléotides Modifiés ”; Bâtiment 17, Campus Triolet, Place Eugène Bataillon 34095 Montpellier Cedex 5 France
| | - Karine Alvarez
- Laboratoire d'Architecture et Fonction des Macromolécules Biologiquesm; Université Aix-Marseille UMR CNRS 7257; Equipe “Antiviral Medicinal Chemistry”; Parc scientifique de Luminy, 163 av. de Luminy 13288 Marseille Cedex 9 France
| |
Collapse
|
8
|
Głowacka IE, Piotrowska DG, Andrei G, Schols D, Snoeck R, Wróblewski AE. Acyclic nucleoside phosphonates containing the amide bond. MONATSHEFTE FUR CHEMIE 2016; 147:2163-2177. [PMID: 27881885 PMCID: PMC5101293 DOI: 10.1007/s00706-016-1848-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/04/2016] [Indexed: 12/11/2022]
Abstract
Abstract To study the influence of a linker rigidity and donor–acceptor properties, the P–CH2–O–CHR– fragment in acyclic nucleoside phosphonates (e.g., acyclovir, tenofovir) was replaced by the P–CH2–HN–C(O)– residue. The respective phosphonates were synthesized in good yields by coupling the straight chain of ω-aminophosphonates and nucleobase-derived acetic acids with EDC. Based on the 1H and 13C NMR data, the unrestricted rotation within the methylene and 1,2-ethylidene linkers in phosphonates from series a and b was confirmed. For phosphonates containing 1,3-propylidene (series c) fragments, antiperiplanar disposition of the bulky O,O-diethylphosphonate and substituted amidomethyl groups was established. The synthesized ANPs P–X–HNC(O)–CH2B (X = CH2, CH2CH2, CH2CH2CH2, CH2OCH2CH2) appeared inactive in antiviral assays against a wide variety of DNA and RNA viruses at concentrations up to 100 μM while marginal antiproliferative activity (L1210 cells, IC50 = 89 ± 16 μM and HeLa cells, IC50 = 194 ± 19 μM) was noticed for the analog derived from (5-fluorouracyl-1-yl)acetic acid and O,O-diethyl (2-aminoethoxy)methylphosphonate. Graphical abstract ![]()
Collapse
Affiliation(s)
- Iwona E Głowacka
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| | - Dorota G Piotrowska
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| | - Graciela Andrei
- Rega Institute for Medical Research, KU Leuven, Minderbroedersstraat 10, 3000 Louvain, Belgium
| | - Dominique Schols
- Rega Institute for Medical Research, KU Leuven, Minderbroedersstraat 10, 3000 Louvain, Belgium
| | - Robert Snoeck
- Rega Institute for Medical Research, KU Leuven, Minderbroedersstraat 10, 3000 Louvain, Belgium
| | - Andrzej E Wróblewski
- Bioorganic Chemistry Laboratory, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland
| |
Collapse
|
9
|
Shi Y, Teng P, Sang P, She F, Wei L, Cai J. γ-AApeptides: Design, Structure, and Applications. Acc Chem Res 2016; 49:428-41. [PMID: 26900964 DOI: 10.1021/acs.accounts.5b00492] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The development of sequence-specific peptidomimetics has led to a variety of fascinating discoveries in chemical biology. Many peptidomimetics can mimic primary, secondary, and even tertiary structure of peptides and proteins, and because of their unnatural backbones, they also possess significantly enhanced resistance to enzymatic hydrolysis, improved bioavailability, and chemodiversity. It is known that peptide nucleic acids (PNAs) are peptidic sequences developed for the mimicry of nucleic acids; however, their unique backbone as the molecular scaffold of peptidomimetics to mimic structure and function of bioactive peptides has not been investigated systematically. As such, we recently developed a new class of peptidomimetics, "γ-AApeptides", based on the chiral γ-PNA backbone. They are termed γ-AApeptides because they are the oligomers of γ-substituted-N-acylated-N-aminoethyl amino acids. Similar to other classes of peptidomimetics, γ-AApeptides are also resistant to proteolytic degradation and possess the potential to enhance chemodiversity. Moreover, in our scientific journey on the exploration of this class of peptidomimetics, we have discovered some intriguing structures and functions of γ-AApeptides. In this Account, we summarize the current development and application of γ-AApeptides with biological potential. Briefly, both linear and cyclic (either through head-to-tail or head-to-side-chain cyclization) γ-AApeptides with diverse functional groups can be synthesized easily on the solid phase using the synthetic protocol we developed. γ-AApeptides could mimic the primary structure of peptides, as they project the same number of side chains as peptides of the same lengths. For instance, they could mimic the Tat peptide to permeate cell membranes and bind to HIV RNA with high specificity and affinity. Certain γ-AApeptides show similar activity to the RGD peptide and target integrin specifically on the cell surface. γ-AApeptides with function akin to fMLF peptides are also identified. More importantly, we found that γ-AApeptides can fold into discrete secondary structures, such as helical and β-turn-like structures. Therefore, they could be rationally designed for a range of biological applications. For instance, γ-AApeptides can mimic host-defense peptides and display potent and broad-spectrum activity toward a panel of drug-resistant bacterial pathogens. Meanwhile, because of their stability against proteolysis and their chemodiversity, γ-AApeptides are also amenable for combinatorial screening. We demonstrate that, through combinatorial selection, certain γ-AApeptides are identified to inhibit Aβ40 peptide aggregation, suggesting their potential use as a molecular probe to intervene in Alzheimer's disease. In addition, a few γ-AApeptides identified from the γ-AApeptide library have been shown to bind to the DNA-binding domain of STAT3 and antagonize STAT3/DNA interactions. Our studies suggest that, with further studies and exploration on both structures and functions, γ-AApeptides may emerge to be a new class of peptidomimetics that play an important role in chemical biology and biomedical sciences.
Collapse
Affiliation(s)
- Yan Shi
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| | - Peng Teng
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| | - Peng Sang
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| | - Fengyu She
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| | - Lulu Wei
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, 4202
East Fowler Ave, Tampa, Florida 33620, United States
| |
Collapse
|
10
|
Ovadia R, Lebrun A, Barvik I, Vasseur JJ, Baraguey C, Alvarez K. Synthesis and structural characterization of monomeric and dimeric peptide nucleic acids prepared by using microwave-promoted multicomponent reactions. Org Biomol Chem 2015; 13:11052-71. [PMID: 26394794 DOI: 10.1039/c5ob01604e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solution phase synthesis of peptide nucleic acid monomers and dimers was developed by using microwave-promoted Ugi multicomponent reactions. A mixture of a functionalized amine, a carboxymethyl nucleobase, paraformaldehyde and an isocyanide as building blocks generates PNA monomers which are then partially deprotected and used in a second Ugi 4CC reaction, leading to PNA dimers. Conformational rotamers were identified by using NMR and MD simulations.
Collapse
Affiliation(s)
- Reuben Ovadia
- Laboratoire d'Architecture et Fonction des Macromolécules Biologiques, Université Aix-Marseille UMR CNRS 7257, Equipe "Antiviral Medicinal Chemistry", Parc scientifique de Luminy, 163 av. de Luminy, 13288 Marseille Cedex 9, France.
| | | | | | | | | | | |
Collapse
|
11
|
Wu H, She F, Gao W, Prince A, Li Y, Wei L, Mercer A, Wojtas L, Ma S, Cai J. The synthesis of head-to-tail cyclic sulfono-γ-AApeptides. Org Biomol Chem 2015; 13:672-6. [DOI: 10.1039/c4ob02232g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Head-to-tail cyclic sulfono-γ-AApeptides.
Collapse
Affiliation(s)
- Haifan Wu
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Fengyu She
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Wenyang Gao
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Austin Prince
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Yaqiong Li
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Lulu Wei
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Allison Mercer
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Lukasz Wojtas
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Shengqian Ma
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| | - Jianfeng Cai
- Department of Chemistry
- University of South Florida
- Tampa
- USA
| |
Collapse
|
12
|
Peel BJ, Efthymiou TC, Desaulniers JP. Synthesis of triazole-nucleoside phosphoramidites and their use in solid-phase oligonucleotide synthesis. ACTA ACUST UNITED AC 2014; 55:4.57.1-38. [PMID: 25631534 DOI: 10.1002/0471142700.nc0457s55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Triazole-backbone oligonucleotides are macromolecules that have one or more triazole units that are acting as a backbone mimic. Triazoles within the backbone have been used within oligonucleotides for a variety of applications. This unit describes the preparation and synthesis of two triazole-nucleoside phosphoramidites [uracil-triazole-uracil (UtU) and cytosine-triazole-uracil (CtU)] based on a PNA-like scaffold, and their incorporation within oligonucleotides.
Collapse
Affiliation(s)
- Brandon J Peel
- Faculty of Science, University of Ontario Institute of Technology, Oshawa, Ontario, Canada
| | | | | |
Collapse
|
13
|
Pathak AK, Pathak V, Reynolds RC. Solution-phase parallel synthesis of acyclic nucleoside libraries of purine, pyrimidine, and triazole acetamides. ACS COMBINATORIAL SCIENCE 2014; 16:485-93. [PMID: 24933643 PMCID: PMC4157782 DOI: 10.1021/co500067c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
![]()
Molecular
diversity plays a pivotal role in modern drug discovery
against phenotypic or enzyme-based targets using high throughput screening
technology. Under the auspices of the Pilot Scale Library Program
of the NIH Roadmap Initiative, we produced and report herein a diverse
library of 181 purine, pyrimidine, and 1,2,4-triazole-N-acetamide analogues which were prepared in a parallel high throughput
solution-phase reaction format. A set of assorted amines were reacted
with several nucleic acid N-acetic acids utilizing
HATU as the coupling reagent to produce diverse acyclic nucleoside N-acetamide analogues. These reactions were performed using
24 well reaction blocks and an automatic reagent-dispensing platform
under inert atmosphere. The targeted compounds were purified on an
automated purification system using solid sample loading prepacked
cartridges and prepacked silica gel columns. All compounds were characterized
by NMR and HRMS, and were analyzed for purity by HPLC before submission
to the Molecular Libraries Small Molecule Repository (MLSMR) at NIH.
Initial screening through the Molecular Libraries Probe Production
Centers Network (MLPCN) program, indicates that several analogues
showed diverse and interesting biological activities.
Collapse
Affiliation(s)
- Ashish K. Pathak
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, Alabama 35205, United States
| | - Vibha Pathak
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, Alabama 35205, United States
| | - Robert C. Reynolds
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, Alabama 35205, United States
| |
Collapse
|
14
|
Pautus S, Sehr P, Lewis J, Fortuné A, Wolkerstorfer A, Szolar O, Guilligay D, Lunardi T, Décout JL, Cusack S. New 7-methylguanine derivatives targeting the influenza polymerase PB2 cap-binding domain. J Med Chem 2013; 56:8915-30. [PMID: 24134208 DOI: 10.1021/jm401369y] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The heterotrimeric influenza virus polymerase performs replication and transcription of viral RNA in the nucleus of infected cells. Transcription by "cap-snatching" requires that host-cell pre-mRNAs are bound via their 5' cap to the PB2 subunit. Thus, the PB2 cap-binding site is potentially a good target for new antiviral drugs that will directly inhibit viral replication. Docking studies using the structure of the PB2 cap-binding domain suggested that 7-alkylguanine derivatives substituted at position N-9 and N-2 could be good candidates. Four series of 7,9-di- and 2,7,9-trialkyl guanine derivatives were synthesized and evaluated by an AlphaScreen assay in competition with a biotinylated cap analogue. Three synthesized compounds display potent in vitro activity with IC50 values lower than 10 μM. High-resolution X-ray structures of three inhibitors in complex with the H5N1 PB2 cap-binding domain confirmed the binding mode and provide detailed information for further compound optimization.
Collapse
Affiliation(s)
- Stéphane Pautus
- Département de Pharmacochimie Moléculaire, Université de Grenoble Alpes/CNRS, UMR 5063 , ICMG FR 2607, 470 rue de la Chimie, BP 53, F-38041 Grenoble, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
|
16
|
Kramer RA, Bleicher KH, Wennemers H. Design and Synthesis of Nucleoproline Amino Acids for the Straightforward Preparation of Chiral and Conformationally Constrained Nucleopeptides. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200557] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
17
|
Müllar S, Strohmeier J, Diederichsen U. 8-Vinylguanine nucleo amino acid: a fluorescent PNA building block. Org Lett 2012; 14:1382-5. [PMID: 22369615 DOI: 10.1021/ol3000603] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Attachment of a vinyl group at guanine position 8 provides fluorescent properties of the nucleobase. Therefore, 8-vinylguanine was introduced as a 2-aminoethylglycine peptide nucleic acid (PNA) building block. Incorporation of the guanine analog in short PNA sequences by Fmoc solid phase peptide synthesis allowed the differentiation between hybridization states of specific double strands with DNA, RNA, and PNA as well as quadruplex forming RNA/PNA oligomers based on fluorescence intensity.
Collapse
Affiliation(s)
- Stefan Müllar
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | | | | |
Collapse
|
18
|
Efthymiou TC, Huynh V, Oentoro J, Peel B, Desaulniers JP. Efficient synthesis and cell-based silencing activity of siRNAS that contain triazole backbone linkages. Bioorg Med Chem Lett 2011; 22:1722-6. [PMID: 22260772 DOI: 10.1016/j.bmcl.2011.12.104] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 12/16/2011] [Accepted: 12/20/2011] [Indexed: 10/14/2022]
Abstract
An efficient synthesis of siRNAs modified at the backbone with a triazole functionality is reported. Through the use of 4,4'-dimethoxytrityl (DMT) phosphoramidite chemistry, triazole backbone dimers were site-specifically incorporated throughout various siRNAs targeting both firefly luciferase and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) gene transcripts as representatives of an exogenous and endogenous gene, respectively. Following the successful silencing of the firefly luciferase reporter gene, triazole-modified siRNAs were also found to be capable of silencing GAPDH in a dose-dependent manner. Backbone modifications approaching the 3'-end on the sense strand were tolerated without compromising siRNA potency. This study highlights the compatibility of triazole-modified siRNAs within the RNAi pathway, and the modification's potential to impart favorable properties to siRNAs designed to target other endogenous genes.
Collapse
Affiliation(s)
- Tim C Efthymiou
- Faculty of Science, University of Ontario Institute of Technology, Oshawa, Ontario, Canada
| | | | | | | | | |
Collapse
|
19
|
Plöger TA, von Kiedrowski G. Improved Large-Scale Liquid-Phase Synthesis and High-Temperature NMR Characterization of Short (F-)PNAs. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201100243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
20
|
Stefan L, Guédin A, Amrane S, Smith N, Denat F, Mergny JL, Monchaud D. DOTASQ as a prototype of nature-inspired G-quadruplex ligand. Chem Commun (Camb) 2011; 47:4992-4. [DOI: 10.1039/c0cc04960c] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
21
|
Inoue Y, Omodani T, Shiratake R, Okazaki H, Kuromiya A, Kubo T, Sato F. Development of a highly water-soluble peptide-based human neutrophil elastase inhibitor; AE-3763 for treatment of acute organ injury. Bioorg Med Chem 2009; 17:7477-86. [PMID: 19811924 DOI: 10.1016/j.bmc.2009.09.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Revised: 09/10/2009] [Accepted: 09/11/2009] [Indexed: 11/25/2022]
Abstract
A series of peptide-based transition-state human neutrophil elastase (HNE) inhibitors with N-terminal acidic moieties were synthesized and their inhibitory activity against HNE was evaluated both in vitro and in vivo. Our results show that compounds containing cyclic amide bridged acidic moieties at the N-terminal have not only improved water solubility but also high in vivo potency. Among these compounds, AE-3763 showed remarkable efficacy in hamster models of elastase-induced lung hemorrhage and lipopolysaccharide (LPS)-induced lung injury as well as in a mouse model of LPS/galactosamine-induced acute multiple organ dysfunctions. The water solubility of AE-3763 (>1000 mg/ml in H(2)O) was also far superior to that of any of the other compounds synthesized. Thus, it is believed that AE-3763 would be useful for treatment of HNE-associated respiratory disorders, such as acute respiratory distress syndrome (ARDS), acute lung injury (ALI), and acute exacerbation of chronic obstructive pulmonary disease (COPD).
Collapse
Affiliation(s)
- Yasunao Inoue
- Drug Research Division, Dainippon Sumitomo Pharma Co, Ltd, Suita, Osaka 564-0053, Japan.
| | | | | | | | | | | | | |
Collapse
|
22
|
Peifer M, De Giacomo F, Schandl M, Vasella A. Oligonucleotide Analogues with Integrated Bases and Backbone. Part 20. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200900047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Katritzky AR, Narindoshvili T. Chiral peptide nucleic acid monomers (PNAM) with modified backbones. Org Biomol Chem 2008; 6:3171-6. [PMID: 18698477 DOI: 10.1039/b806141f] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Convenient high yielding syntheses of optically pure PNAMs comprising l- or d-serine, l-lysine and l-arginine units linked to thymine or Cbz-cytosine are described. Simple workup and inexpensive reagents are employed and free amino acids are used as coupling components.
Collapse
Affiliation(s)
- Alan Roy Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA.
| | | |
Collapse
|
24
|
Wojciechowski F, Hudson RHE. A convenient route to N-[2-(Fmoc)aminoethyl]glycine esters and PNA oligomerization using a Bis-N-Boc nucleobase protecting group strategy. J Org Chem 2008; 73:3807-16. [PMID: 18412392 DOI: 10.1021/jo800195j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A simple and practical synthesis of the benzyl, allyl, and 4-nitrobenzyl esters of N-[2-(Fmoc)aminoethyl]glycine is described starting from the known N-(2-aminoethyl)glycine. These esters are stored as stable hydrochloride salts and were used in the synthesis of peptide nucleic acid monomers possessing bis-N-Boc-protected nucleobase moieties on the exocyclic amino groups of ethyl cytosin-1-ylacetate, ethyl adenin-9-ylacetate and ethyl (O(6)-benzylguanin-9-yl)acetate. Upon ester hydrolysis, the corresponding nucleobase acetic acids were coupled to N-[2-(Fmoc)aminoethyl]glycine benzyl ester or to N-[2-(Fmoc)aminoethyl]glycine allyl ester in order to retain the O(6) benzyl ether protecting group of guanine. The Fmoc/bis-N-Boc-protected monomers were successfully used in the Fmoc-mediated solid-phase peptide synthesis of mixed sequence 10-mer PNA oligomers and are shown to be a viable alternative to the currently most widely used Fmoc/Bhoc-protected peptide nucleic acid monomers.
Collapse
Affiliation(s)
- Filip Wojciechowski
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
| | | |
Collapse
|
25
|
Upert G, Mehiri M, Di Giorgio A, Condom R, Patino N. Solid-phase synthesis and thermal denaturation study of cyclic PNAs targeting the HIV-1 TAR RNA loop. Bioorg Med Chem Lett 2007; 17:6026-30. [PMID: 17826994 DOI: 10.1016/j.bmcl.2007.07.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 07/04/2007] [Accepted: 07/05/2007] [Indexed: 10/23/2022]
Abstract
Cyclic PNAs targeting the HIV-1 TAR RNA loop have been synthesized following a convenient solid-phase strategy which allows on-resin cyclisation. UV-monitored thermal denaturation studies demonstrate that these cyclic PNAs are able to strongly interact with their TAR RNA target, very likely through the formation of a six-base pair stable complex, involving the TAR RNA loop.
Collapse
Affiliation(s)
- Gregory Upert
- Laboratoire de Chimie des Molécules Bioactives et des Arômes (LCMBA), UMR UNSA-CNRS 6001, Université de Nice-Sophia Antipolis, 06108 Nice Cedex 2, France
| | | | | | | | | |
Collapse
|
26
|
Mehiri M, Caldarelli S, Di Giorgio A, Barouillet T, Doglio A, Condom R, Patino N. A "ready-to-use" fluorescent-labelled-cysteine-TBTP (4-thiobutyltriphenylphosphonium) synthon to investigate the delivery of non-permeable PNA (peptide nucleic acids)-based compounds to cells. Bioorg Chem 2007; 35:313-26. [PMID: 17368717 DOI: 10.1016/j.bioorg.2007.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2006] [Revised: 01/24/2007] [Accepted: 01/24/2007] [Indexed: 11/27/2022]
Abstract
This paper reports: (i) the facile synthesis of a cysteine synthon incorporating both a fluorescent group and a triphenylphosphonium derivative (TBTP) via the formation of a disulphide bond, which can subsequently undergo facile intracellular scission, (ii) the direct conjugation of this synthon to a non-permeable drug, (a cyclic PNA (peptide nucleic acid)-based compound has been chosen as a model), and (iii) that this conjugation enables the efficient homogenous delivery of the otherwise non-permeable cyclic PNA into the cytoplasm of cells, as demonstrated by fluorescence microscopy. Our results indicate that this fluorescent-labelled cysteine-TBTP synthon can provide a very useful tool for exploring the cellular uptake of a large range of molecules of biological interest, containing only a single reactive function. The preparation of an activated TBTP derivative is also described and this procedure could be widely used to introduce a TBTP cation to any thio-containing molecule.
Collapse
Affiliation(s)
- Mohamed Mehiri
- Laboratoire de Chimie des Molécules Bioactives et des Arômes UMR-CNRS 6001, Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 2, France
| | | | | | | | | | | | | |
Collapse
|
27
|
Moggio L, De Napoli L, Di Blasio B, Di Fabio G, D'Onofrio J, Montesarchio D, Messere A. Solid-phase synthesis of cyclic PNA and PNA-DNA chimeras. Org Lett 2007; 8:2015-8. [PMID: 16671770 DOI: 10.1021/ol0603559] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text] A new and versatile on-line automated solid-phase approach to obtain cyclic PNA (I and III) and cyclic PNA-DNA chimeras (II) in highly pure form has been developed. Starting from a Tentagel matrix functionalized with a 3-chloro-4-hydroxyphenylacetic linker, the synthesis of representative, new cyclic molecules by standard peptide and phosphoramidite-based chemistry has been achieved.
Collapse
Affiliation(s)
- Loredana Moggio
- Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta, Italy
| | | | | | | | | | | | | |
Collapse
|
28
|
de Koning MC, Petersen L, Weterings JJ, Overhand M, van der Marel GA, Filippov DV. Synthesis of thiol-modified peptide nucleic acids designed for post-assembly conjugation reactions. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.01.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
29
|
Caldarelli SA, Mehiri M, Di Giorgio A, Martin A, Hantz O, Zoulim F, Terreux R, Condom R, Patino N. A cyclic PNA-based compound targeting domain IV of HCV IRES RNA inhibits in vitro IRES-dependent translation. Bioorg Med Chem 2005; 13:5700-9. [PMID: 16061387 DOI: 10.1016/j.bmc.2005.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Revised: 06/03/2005] [Accepted: 06/03/2005] [Indexed: 11/28/2022]
Abstract
A cyclic molecule 1 constituted by a hepta-peptide nucleic acid sequence complementary to the apical loop of domain IV of hepatitis C virus (HCV) internal ribosome entry site (IRES) RNA has been prepared via a 'mixed' liquid-phase strategy, which relies on easily available protected PNA and poly(2-aminoethylglycinamide) building blocks. This compound 1 has been elaborated to mimic 'loop-loop' interactions. For comparison, its linear analog has also been investigated. Although preliminary biological assays have revealed the ability of 1 to inhibit in vitro the HCV IRES-dependent translation in a dose-dependent manner, the linear analog has shown a slightly higher activity.
Collapse
Affiliation(s)
- Sergio A Caldarelli
- Laboratoire de Chimie Bioorganique UMR-CNRS 6001, Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex, France
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Upert G, Mehiri M, Goddard ML, Giorgio AD, Benhida R, Condom R, Patino N. The ‘fully protected backbone’ approach as a versatile tool for a new solid-phase PNA synthesis strategy. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
31
|
|
32
|
Caldarelli S, Depecker G, Patino N, Di Giorgio A, Barouillet T, Doglio A, Condom R. Synthesis and cellular uptake of a fluorescently labeled cyclic PNA-based compound. Bioorg Med Chem Lett 2004; 14:4435-8. [PMID: 15357967 DOI: 10.1016/j.bmcl.2004.06.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2004] [Revised: 06/01/2004] [Accepted: 06/17/2004] [Indexed: 11/17/2022]
Abstract
A cyclic hexameric PNA-based compound labeled with fluorescein has been prepared following the liquid phase FPB strategy. Its cellular uptake, without and with electroporation, has been investigated by fluorescence microscopy.
Collapse
Affiliation(s)
- Sergio Caldarelli
- Laboratoire de Chimie Bioorganique UMR-CNRS 6001, Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Cédex 2, France
| | | | | | | | | | | | | |
Collapse
|
33
|
de Koning MC, Filippov DV, van der Marel GA, van Boom JH, Overhand M. Synthesis of macrocyclic peptide nucleic acid derivatives via intramolecular chemical ligation. Tetrahedron Lett 2003. [DOI: 10.1016/j.tetlet.2003.08.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|